java.lang.RuntimeException: Unable to create application com.app.MyApp: java.lang.NullPointerException: FirebaseCrashlytics component is not present

Question

Getting this crash on only release build with r8 enabled on migrating from crashlytics to firebase SDK and upgrading gradle plugin version

Note : I have multidex dependencies defined and set in build.gradle and also in the application class. This happens only when i upgrade my gradle plugin version from 3.5 to 4.1

I am using firebase-crashlytics version

implementation 'com.google.firebase:firebase-crashlytics:17.0.0'

Grade plugin version

classpath 'com.android.tools.build:gradle:4.0.1'

Crashlytics gradle plugin version

classpath 'com.google.firebase:firebase-crashlytics-gradle:2.4.1'

Also I am getting warning in the logcat for

W/ComponentDiscovery: Class com.google.firebase.crashlytics.CrashlyticsRegistrar is not an found.
    java.lang.ClassNotFoundException: com.google.firebase.crashlytics.CrashlyticsRegistrar

 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.crashlytics.CrashlyticsRegistrar" on path: DexPathList


W/ComponentDiscovery: Class com.google.firebase.auth.FirebaseAuthRegistrar is not an found.
    java.lang.ClassNotFoundException: com.google.firebase.auth.FirebaseAuthRegistrar

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.auth.FirebaseAuthRegistrar" on path: DexPathList

W/ComponentDiscovery: Class com.google.firebase.database.DatabaseRegistrar is not an found.
    java.lang.ClassNotFoundException: com.google.firebase.database.DatabaseRegistrar

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.database.DatabaseRegistrar" on path: DexPathList

To get rid of the above warning I added the following in android manifest under application tag

 <service android:name="com.google.firebase.components.ComponentDiscoveryService" >
      <meta-data
          android:name="com.google.firebase.components:com.google.firebase.auth.FirebaseAuthRegistrar"
          android:value="com.google.firebase.components.ComponentRegistrar" />
      <meta-data
          android:name="com.google.firebase.components:com.google.firebase.database.DatabaseRegistrar"
          android:value="com.google.firebase.components.ComponentRegistrar"/>
      <meta-data
          android:name="com.google.firebase.components:com.google.firebase.crashlytics.CrashlyticsRegistrar"
          android:value="com.google.firebase.components.ComponentRegistrar"/>

    </service>

Still no luck with it. After doing all these I see this

java.lang.RuntimeException: Unable to create application com.app.MyApp: java.lang.NullPointerException: FirebaseCrashlytics component is not present

NPE when I try to access

FirebaseCrashlytics.getInstance();

Answer 1

Adding -keep class com.google.firebase.** { *; } into proguard-rules.pro, fixed this issue.

Answer 2

Had problem with this, looks like we have to manually register in our manifest

Insert this into your manifest:

  <service
        android:name="com.google.firebase.components.ComponentDiscoveryService"
        android:exported="false"
        android:directBootAware="true"
        tools:targetApi="n">

        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.analytics.connector.internal.AnalyticsConnectorRegistrar"
            android:value="com.google.firebase.components.ComponentRegistrar" />
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.iid.Registrar"
            android:value="com.google.firebase.components.ComponentRegistrar" />
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.crashlytics.CrashlyticsRegistrar"
            android:value="com.google.firebase.components.ComponentRegistrar" />
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.installations.FirebaseInstallationsRegistrar"
            android:value="com.google.firebase.components.ComponentRegistrar"/>
    </service>

With this you will see that the application will log itself (in adb logcat -s FirebaseCrashlytics)

But the reports were still not being sent, looking at the output of the logs showed Transport backend 'cct' is not registered.

Crashlytics report could not be enqueued to DataTransport
    java.lang.IllegalArgumentException: Transport backend 'cct' is not registered
      at com.google.android.datatransport.runtime.scheduling.DefaultScheduler.lambda$schedule$1$DefaultScheduler(DefaultScheduler.java:77)
      at com.google.android.datatransport.runtime.scheduling.-$$Lambda$DefaultScheduler$DT3VaFjNTilJSvcr2dFbjD3xxDQ.run(Unknown Source:8)
      at com.google.android.datatransport.runtime.SafeLoggingExecutor$SafeLoggingRunnable.run(SafeLoggingExecutor.java:47)

Then just add this information to your manifest

<service android:exported="false" android:name="com.google.android.datatransport.runtime.backends.TransportBackendDiscovery">
     <meta-data android:name="backend:com.google.android.datatransport.cct.CctBackendFactory" android:value="cct"/>
</service>

<service
    android:name="com.google.android.datatransport.runtime.scheduling.jobscheduling.JobInfoSchedulerService"
    android:exported="false"
    android:permission="android.permission.BIND_JOB_SERVICE"/>

And add initialize firebase in your app in oncreate

class MyApp : Application() {

    override fun onCreate() {
        super.onCreate()
        ...
        FirebaseApp.initializeApp(this)
    }
}

References: This and this

Hope this helps.

Answer 3

Try adding Firebase-BOM in Gradle (app).

implementation platform('com.google.firebase:firebase-bom:26.1.1')

Then in your Application class Instead of

FirebaseCrashlytics.getInstance();

Use

FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);